Product Overview

The SE4035S2B1 is a 2 x AO card from Emerson. This card provides 8 analog output channels in total. Each channel supports 4 to 20 mA signals with HART communication. The SE4035S2B1 includes a redundant AO 8-channel terminal block for high availability. Consequently, this card is ideal for critical control loops requiring backup paths. The device types include standard 4 to 20 mA instruments with HART capability.

Technical Specifications

Number of channels: Eight
Device types: 4 to 20 mA
Full signal range: 1 to 23 mA
Resolution: 14-bit D/A converter
Calibration: None required
Output compliance voltage: 20 mA at 21.6V DC supply into 700 Ω load
Open-loop detection: <0.70 mA
Optional fuse: 2.0 A (terminal block option)

Accuracy Over Temperature Range

The SE4035S2B1 delivers excellent accuracy across its operating range. Specifically, accuracy is 0.25% of span from -40 to 60°C. Furthermore, accuracy is 0.4% of span from 60 to 70°C. As a result, this card maintains reliable performance even in demanding thermal environments. The SE4035S2B1 requires no field calibration, which reduces maintenance costs and downtime.

Power and Current Ratings

Local bus current per card (12V DC nominal) - Simplex: 120 mA typical, 150 mA maximum
Local bus current per card (12V DC nominal) - Redundant: 175 mA typical, 250 mA maximum
Field circuit power per card: 300 mA maximum @ 24V DC (+/-10%)
Isolation: Each channel is optically isolated from the system and factory tested to 1500V DC

The SE4035S2B1 draws higher current in redundant configurations. Therefore, you must account for this difference during system power budgeting. The optical isolation protects the controller from field wiring faults. Consequently, the SE4035S2B1 enhances overall system reliability and safety.

HART Communication Features

The SE4035S2B1 supports HART pass-through for AMS Device Manager. This enables seamless integration with intelligent field devices. Furthermore, the card provides HART variable and status reporting for control functions. The typical HART scan time is 600 to 800 ms per enabled channel. As a result, the SE4035S2B1 delivers both analog control and digital device diagnostics over the same wiring.

Redundancy and Terminal Block Options

The SE4035S2B1 includes a redundant AO 8-channel terminal block. This terminal block supports 2.0 A optional fuses for enhanced protection. The redundant design allows one card to take over seamlessly if the primary card fails. Therefore, critical control loops remain active without interruption. The SE4035S2B1 is part of Emerson's DeltaV S-series I/O family.

Design and Construction Features

The SE4035S2B1 uses a 14-bit D/A converter for precise analog output generation. Each channel is optically isolated from the system and factory tested to 1500V DC. No calibration is required, which simplifies commissioning and maintenance. The open-loop detection threshold is set below 0.70 mA. Consequently, the SE4035S2B1 can detect broken wires or disconnected field devices reliably.

Installation Guidelines

1. First, mount the S-series carrier on a standard DIN rail.
2. Then, snap the SE4035S2B1 card into the designated slot.
3. Next, connect the redundant AO 8-channel terminal block to the card.
4. For simplex operation, use only the primary terminal block connections.
5. For redundant operation, install two SE4035S2B1 cards in parallel.
6. After that, wire each field device to the appropriate output channel.
7. Ensure the load resistance does not exceed 700 Ω at 20 mA.
8. Then, apply 24V DC field circuit power at 300 mA maximum per card.
9. Verify the local bus provides sufficient current for your configuration.
10. Finally, configure HART pass-through in AMS Device Manager as needed.

Packaging List

- 1 x SE4035S2B1 2 x AO card (8 channels)
- 1 x Redundant AO 8-channel terminal block
- 1 x S-series carrier mounting base (if not already present)
- 1 x Quick start wiring and configuration guide

Common FAQ

1. Does the SE4035S2B1 require calibration before use?
No, the SE4035S2B1 requires no calibration. This reduces maintenance costs and simplifies installation procedures significantly.

2. What is the accuracy of the SE4035S2B1 at high temperatures?
Accuracy is 0.25% of span from -40 to 60°C. Furthermore, accuracy is 0.4% of span from 60 to 70°C for the SE4035S2B1.

3. Does the SE4035S2B1 support HART communication?
Yes, the SE4035S2B1 supports HART pass-through for AMS Device Manager. It also provides HART variable and status reporting for control functions.

4. What is the typical HART scan time per channel?
The typical HART scan time is 600 to 800 ms per enabled channel on the SE4035S2B1. Therefore, device data updates are timely and reliable.

5. Can I use the SE4035S2B1 in a redundant configuration?
Yes, the SE4035S2B1 includes a redundant AO 8-channel terminal block. Two cards can operate in parallel for high availability applications.